<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>用户登录</title>
    <style>
        body {
            width: 500px;
            height: 100%;
            margin: 80px auto;
        }
        
        h2,
        p {
            text-align: center;
        }
        
        button {
            margin: auto;
        }
    </style>
</head>

<body>
    <h2>用户登录</h2>
    <hr>
    <p>
        <label for="username" id="username">用户名：</label>
        <input type="text" placeholder="请输入用户名">
    </p>
    <p>
        <label for="username">密码：</label>
        <input type="password" placeholder="请输入密码" id="password">
    </p>
    <p><input type="checkbox"> 30天内免登陆</p>
    <button>登录</button>
</body>
<script src="jquery.min.js"></script>
<script>
</script>

</html>